/Engine/Source/Runtime/RenderCore/Public/RendererInterface.h
void RequestVirtualTextureTiles ( const [FMaterialRenderProxy](API\Runtime\Engine\Materials\FMaterialRenderProxy) * InMaterialRenderProxy, const FVector2D & InScreenSpaceSize, [ERHIFeatureLevel::Type](API\Runtime\RHI\ERHIFeatureLevel__Type) InFeatureLevel )